茅坪溪土石坝安全复核  

Verification of rockfill dam safety according to back analysis of monitoring data

作　　者：朱晟[1] 曹广晶[2] 张超然[2] 周良景[3] 

机构地区：[1]河海大学水利水电工程学院,江苏南京210098 [2]中国长江三峡工程开发总公司,湖北宜昌441000 [3]长江水利委员会设计院,湖北武汉411000

出　　处：《水利学报》2004年第11期124-128,共5页Journal of Hydraulic Engineering

摘　　要：利用施工期的现场监测资料,应用非线性粘弹性有限元仿真分析,对茅坪溪土石坝进行了安全复核。采用邓肯E μ模型作为坝体填料的本构关系模型,沥青混凝土材料参数根据监测资料反演求得。大坝的安全复核分析结果揭示了分区填筑的高沥青混凝土心墙的变形和应力特性。结论认为:水库蓄水后沥青混凝土心墙不会产生水力劈裂,大坝是安全的。The safety of the Maopingxi rockfill dam was checked by monitoring data in the stage of construction.The nonlinear visco-elasto FEM analysis on the dam was carried out.The parameters of asphalt concrete core material for Duncan E-μ model were deduced from the back analysis of monitored data.The simulation revealed the complicated strain and stress distributions of the dam in the process of construction.It is concluded that the hydraulic fracture will not happen to the asphalt-concrete impervious core wall since the vertical stress at the bottom increased during filling of the dam.The safety of the dam can be ensured.

关 键 词：沥青混凝土防渗心墙 堆石坝 安全复核 非线性粘弹性模型 

分 类 号：TV641.1[水利工程—水利水电工程]